Electronically Controlled Diaphragm Pump Valco Melton's DD-1 Diaphragm Pump represents an innovative breakthrough in pump design. The electronic reversing control is extremely reliable and is not affected by normal wear characteristics of mechanical devices. The DD-1 Diaphragm Pump is automatically reversed by low-voltage, solid-state electronics. Many diaphragm pumps use air-powered mechanical devices, which reserve the pump stroke. These reversing mechanisms can "hang-up" and stall the pump when operated at low air pressure or when cycling at slow speeds. To overcome these limitations, common diaphragm pumps must be operated at air pressures high enough to ensure stroke reversal. For most applications, this results in an expensive waste of compressed air. In addition, mechanical reversing devices wear out, resulting in frequent downtime for maintenance and rebuilding. • The electronic reversing control offers extreme reliability • Not affected by normal wear characteristics of mechanical devices • Teflon® diaphragms come standard • Can be cycled very slowly or operated at very low air pressure without stalling or hanging up • Lightweight, injection-molded nylon construction • Modular for fast, simple in-line service Please Recycle ©Valco Cincinnati, Inc. All Rights Reserved. Valco Cincinnati reserves the right to make changes between printing.

Because of the DD-1 pump’s innovative design, it cannot hang up or stall. When used for intermittent output applications, the pump will stop, then immediately restart as the system requires. The electronic reversing control enables the pump to operate at air pressures as low as 4 psi without getting stuck. This can offer significantly reduced air consumption. It also permits very slow cycling for applications where demand is low, when pumping viscous materials, or when the material being pumped requires delicate handling. The DD-1 comes standard with Teflon® diaphragms and ball-check valves,...